water cooling
1) very low temps
2)very quite
3)superior looks(looks like a spaceship :lol
![Smile :) :)](/data/assets/smilies/smile.gif)
4)very good for overclocks
only problem is chance of leak(only if you don't do it properly)
air cooling
1)very easy to employ
2)cheap(you could say that )
that's pretty much it(now make the ultimate choice(up to you)